Geometric shapes in our life

The geometric shape/pattern can be made of anything. Lines, circles, squares, triangles, etc.
Abstract works are not allowed, the geometric shape must something present in the real world, something that we've seen and shot. It must be a characterizing element of the picture, but doesn't need to be the only subject of it.
If you want, please add some comments/explanations to the picture.

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reviewed by the challenge owner. Depending upon the nature and applicability of the
complaint, the entry may be disqualified. In extreme circumstances the user who submitted
the entry may receive a ban from the challenge or series in question.